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Table 2 Descriptive characteristics of environmental variables, December to February 2000 to 2012

From: The impact of heatwaves on emergency department visits in Brisbane, Australia: a time series study

  Tmax (°C) Relative humidity (%) O3(ppm) PM10(μg/m3) NO2(ppm)
Mean 29.83 59.90 0.02 18.43 <0.01
(95% CI) (29.68, 29.97) (59.21, 60.59) (0.02, 0.02) (18.03, 18.83) (0.00, 0.00)
SD 2.43 11.90 0.01 6.71 0.00
Minimum 20.32 20.83 0.00 4.70 0.00
Maximim 40.20 95.83 0.04 81.31 0.01
Median 29.72 58.20 0.01 17.57 0.00
95 pct 33.92 82.44 0.03 29.74 0.01
99 pct 36.47 89.41 0.03 44.30 0.01
  1. Tmax, daily maximum temperature in centigrade; O3, ozone; PM10, particulate matter with <10 micrometers in aerodynamic diameter; NO2, nitrogen dioxide; 95 pct, 95th percentile; 99 pct, 99th percentile.